docs: def scrape(self, selector, cleaner=None, processor=None):
          """Scrape the value for this field from the selector."""
          # Apply CSS or XPath expression to the selector
          selected = selector.xpath(self.selection) if self.xpath else selector.css(self.selection)
          # Extract the value and apply regular expression if specified
          value = selected.re(self.re) if self.re else selected.extract(raw=self.raw, cleaner=cleaner)
          return self._post_scrape(value, processor=processor)